Measuring valve



` All@ n L"1928 D. H. SWEET MEASURING VALVE Filed my .30, 1926 PUMP ffl

in the nature of a pum conduit l2 to a main 14 iromwhich branches lll titutented Aug. '7, 1928.

UNITED STATES PATENT oFF1cE.

li'ttlittihlllm H. SWEET, OF EVANSTON, ILLINOIS, ASSIGNOR TO THE BASSICK MANUFAC- 'ltlURING COMPANY,'OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

MEASURING VALVE.

Application filed July 30,

Jtnother Objectis the production-.of a de vice such that it is vimpossible to holdl the parts open by any abnormalppressure fluctuation within the capacity of thepressure supply means.

ltlnrther objects and advantages 'oftheinvention will become apparent as the descr1p` ticnproceeds.

lin the accompanying drawings :v litigare l is a diagram indicating a system oit the type to whichmy invention is applicablej, .l l

lligiure 2 is a central, longitudinal section, Averymuch enlarged, through V one of the measnuringvalves;` and v- Figure 3 is a' section on 'line 3-3 of Figure Q; 1

lected tor Villustration there is indicated a suitable sourceY oi lubricantl underpressure l connected by a i6 lead to the-individual measuring devices "i6 rationing the lubricant for the bearings a@ to which they are attached. The pump idg eucept that it must have certainpres-- sure producing characteristics well known to fthe prior art, may-be ot any suitable orpreterred type, suoli, for instance, as the pump .described and illustrated in the copending ap lication of Locke, Dosch and iiltegeman,

erial lilo.IA 567,906, filed June' i3, .its 4the details ofthe pump per se have no bearing on thepresent invention,4 this description has not beenencdmbered .'tvith such details. 'liteterring, now, to Figure 2, the conduit lr6 discharges into a chamber 22 delined by the body member @t and a suitable coupling connection comprising an. end piece 26 threaded into the body against a stop shoulder Q6 and a fastening nut 30 adapted to compress the ring 39; on the tube i6 and clamp it hrmly place.. The discharge end 'piston s38.

192e. serial 110,125,980.

of the bodyQli` is provided with a pipe threaded terminal 345 housing an outlet check valve 36 of we ll known design.

The pump delivers abriefpressure impulse at relatively long intervals of time, and relieves thepressure at the end of the impulse so Ythat intervals between "are per-iods of `relatively low pressure in the supply tube 16. Within the chamber -22 Ilia-ve provi-ded means actuated automatically between variations -in the supply'pressure for j iermitting.` the 4discharge of a predetermined amount of lubricant during each pressure cycle. In Figure 2 the parts are shown in the position they occupy at the end of thc discharge stroke,` previous to relief ofpressure in lthe supply tube 16.

The main piston'38 comprises a cup opening toward the inlet withl suitable lubricant pressed sealingmeans in the nature of a cup leather 40 at itsfupper end. In the em-V bodiment illustratedthe wallv of the cup is smaller .than thef.d iameter of the chamber .224 and is turned-out 'at142,"in again at lll and up at 46 todeline an annular lseat Jfor the cupl leather 'and an annular housing space at48 for the return spring 50. Inside lin the embodiment of the invention se i .the main piston I lprovide a smaller valve piston 52 in thelshape of a cup opening toward the outlet end Vand adapted to seat on a fiber sealing washer 5i surrounding an outlet opening 56 in the bottom of the main The return spring 58 for the valve piston `52 bears, at its lower end, di*A rectly on the 4wall of the'chamber 2Q, and at its upper end against the bottom of the cup.. A

Mounted on the main piston 38 l provide a triggerlocking element in the form oit a ring'60 apertured at 62 to receive clamping fingers 64 projecting. up from the main pis ton. The flange thus employed' to fasten the ring 60 to the main piston also forms a clamping washer for the cup leather 40. A

adapted to snap over the lower corner of the inlet tubeO, which 'l have illustrated as integralwith the end piece Q6." rlhe end ot the inlet tube 70 is .provided with a relative ,ly'small dischargeopening- ,72 adapted to receive and guide a. central tip 'it -in the bottom of the pistou valve, and theeides of soA ico4

the tube -are provided with a plurality of relatively large apertures 7 6 constituting the' main means of communication with the chamber 22. Y

The operation of the device through.a

complete cycle, beginning with the position illustrated in Figure 2, is asfollows The pump '-10 is designed `to produce .a

pressure impulse oa predetermined amount,

say, for instance, 200 poundsY per'square inch. The .strength of the spring 50y for use in connection With suoli a pump may correspond to a hydraulic pressure over the area of the main piston,l of the order of magnitude of 60 pounds per Asquare inch.' The strength.. of the spring 58 may correspond to a hydraulic vpressure over the area of the piston valve of the order of magnitude of 40 pounds per .square inch. Y The 'back pressure of the check valve 36 maybe of any amount W'ithinthe capacity ofthe pressure supply means, but will ordinarily be of the order of magnitude of pounds per square inch. The drop in pressure in Athe chamber 22 above the barrier established by 1the piston and piston valve will continue until thepressure has been reduced below that necessary to hold the piston valve 52 closed. Prior to that time, the pressure will cease to hold the main piston against the discharge'end of the chamber in opposition to the force of the spring 50, but the hooks 68 form a mechanical lock so'that the `force of the spring will merely be"`tra`nsferred from the lubricant to thehooks 68'w`ithout any appreciable `movement of the main piston. As soon as ,the supply pressurehas fallen sufficiently to permit the spring 58 to open the 'piston valve, that part will movebaek into abutment with the endet the inlet tube 70. The

tip i 74V willA enter the opening 7 2 and the. bottom of the valve will slide on the inclined' portions of -the projections .68 and press them out until they snap onto the cylindrical portion of the tube 70. No furthermoveinent of the'valve piston will occur.

The release of the projections 68 permits the spring 50 to move the main A piston up until its further progress is arrested by contact between the piston valve and its seat't. During this movement a volume of lubricant equal to the cross sectional area of the chamber` 22 multiplied by the stroke of the pis- .ton will be transferred to the` lower'side of the barrier now re-established at a higher level, ready for discharge throught-he'check valve'3`6 on the next pressure impulse.

Because the aggregate area of the openings 62 is 'many timesgreater than the open- Ying for the check. valve-'36, it will be impossible for' any pressure that fthe pump 10 could possibly develop to arrest the return stroke of the main piston and hold it in anA intermediate position after the hooks 68 have been released, in jwhich condition therer` the would be an open passage through the device. Thus, with the spring strengths above mentioned, a pressure diop of (50 pounds per square inchv through the openings 62 would have to be maintained by the rapidity of the discharge. But, with the valve 3G of 1/8 the area of the openings 62, the pressure drop through the valve opening for the samerate of iow would have to be approximately 480 pounds per square inch. This is not only more than twice the pressure producing capacity of the supply pump, but the volume discharged would be relatively large and the pressure would have to be maintained in spite of such a continuous discharge.' Similarly, to create a pressure difference through the orifices 62 that Would stop the valve 52 at an intermediate point in its return stroke would require a sustained supply pressure of at least 320 pounds per square inch. 'lo prevent any excess in pressure inside the fingers 66 which might assist in holding the valve 52 against return movement, I have made theaggregate opening of the orifices f7 6. many times greater than that of the openings 72. l

ecause the minimum pressure difference involved in the. movement of the parts is the l0-pound pressure developed by the spring4U 58. it is immaterial whether a vacuum is developed or not in any part of the device. Thus, the formation of a groove in the ,Washer 54 could -not develop any vaciuiin that would prevent operation of the device.,

It will thus be apparent that, after the reduction of pressure to a point where the valve 52 opens, no pressure that the pump is capable of producing could prevent the return of both parts of the barrier to the upper position ready for the next pressure impulse. It is also apparent that during ressure 'impulse there is no transfer of lubricant past the barrier, which maintains a tight lubricant pressed seal .by means of the cup leather 40 and the liber valve seat 54.

Without further elaboration the foregoing will so fully explain the gist of my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service, without veliminating certain features which may check valve, resilient means tending to move lll ' nevaeea to a pressure substantially greater than the j loading oit said piston check valve.

il. flmeasuring valve comprising a chamber having an inlet and an Aoiitlet, a piston slidable in said chamber,"a check valve in said piston opening by movement toward -said inlet, a ,checlr valve in said outletopen ing away from said chamber, resilient means tending to close said outlet checlr valve, resilient means tending to open Asaid piston check valve, resilient means tending to move said piston toward said inlet, trigger means ll'or holding said piston at the outlet end, and a V.mechanicalconnection between said piston checli valve and said trigger means for releasing said piston when said checlr valve has moved to the end ol its return stroke, said piston being loaded to a pressure substantiall greater than the loading of said piston c eck valve. i

3. lr measuring valve comprising a chamber having an inlet and an outlet, a piston slidable in said chamber, a check valve in said piston, a check valve in said outlet, re-

I .silient means tending toclose said outlet clieclr valve, resilient means tending to open A said piston ehec'li valve, resilient means tendtrigger means tor holding said piston at the ing to move said piston vtoward said inlet,

outlet end, and a'mechanical connection between said piston check valve andsaid trigger means t'or releasing'said piston, said,`

piston check valve being loaded to a pressure substantially greater than that of atmosphere, and said piston being loaded y"to a. pressure substantially greater than the loading of said piston check valve.r

4t. l measuring valve comprising a chamber having an inlet and an outlet, a piston slidable in said chamber, a check valve in said piston, a checlrv valve in said outlet, re-4 silient means tending to close said outlet check valve, resilient-means tending to open said piston check valve, resilient means tending to move said piston'tow'ard said inlet, trigger means for holding said piston at the outlet end, and a mechanical Aoonneotiondoetween said piston checlr valve and said trig-l ger means tor releasing -saidpiston, said piston being loaded toa pressure sulostanllffllllf glllmtrlian the loading'of said piston checlr valve;1

5. l measuring valve comprising a. chambei', pressure actuated means for expelling a charge from said chamber, spring actuated -means lor admitting a newrha'rge to said chamber, trigger means set by expelling a charge lor delaying the operation ,of said admitting means, and pressure sensitive means operating below a predetermined pressure less than that necessary to expel a charge' to i'ender said admitting means hydraulically operative and to trip said trigger means,

,and above said predetermined pressure to render said admitting means hydraulically inoperative, said predetermined pressure being substantially greater than atmospheric pressure. J

6. A measuring valve comprising a chamber, means for expelling a charge from said chamber, springactuated means for admit ting a new charge to said chamber, trigger means set by expelling a charge for delaying lthe operation of said admitting means, and pressure sensitive meansoperating belo'iv a predetermined pressure to trip said trigger' means, said predetermined pressure being substantially greater than atmospheric pressure.

7. il measuring valve comprising a chamber, means for expelling a charge from said chamber, means `for admitting a new charge to said chamber, trigger means set by ei;- peiling a charge for delaying the operation ot' said admitting means, and pressure sensitive means operating below a predetermined .pressure to trip` said trigger means, said predetermined pressure being substantially i greater than atmospheric pressure.

Y to said chamber, trigger means set by-ex- `polling a charge, for delaying the operation ot' said admitting means, and means tor tripping said trigger means. 4

l0.4 A measuring valve comprising a chamber, means for expelling a 'charge from said chamber, means for' admitting a new charge to said chamber, and'i'trigger means set by expellinga charge ormechanically delaying the operation or" said admitting means,

ll. il measuring valve comprising a cham ber, a barrier therein, means permitting said barrier to yield under a pressure impulse, by-pass means forming part of vsaid barrier and rendered operative by displacement of said 'barrier and subsequent reduction in pressure' for opening communication between opposite sides oli said vbarrier,.means for returning sardbarjiier'to initial position and closing said commimication, anda mechani lll lUll

lili

cal interlock between said by-pass means and said returning means for rendering said returning means inoperative until said bypass means has subst-antially completed its return movement to initial position.

12. A measuring valve comprising a chains ber, a barrier the-rein, means permitting said barrier to' yield under a pressure impulse, by-pass means rendered operative by displacement ot said barrier and subsequent reduction in pressure for opening communicaj tion between opposite sides of sai-d barrier,

means for returning said barrier to initial .positon and closing said communication, and

a mechanical interlock between said by-pass means and said returning means.`

13. A measuring valve comprising a chamber, a barrier therein normally preventing passage of' lubricant therethrough, means permitting saidl barrier. to yield under a pressure impulse',and by-pass means rendered operative .by displacement of said barrier and vsubsequent reduction in pressure for opening communication between opposite sides of said barrier.

.1.4. A measuring valvecomprising a chamber, a barrier therein normally'closin'g said V-`chamber against passage of lubricant therethrough, means permitting said barrier to yield'under apressure impulse, and by-pass means fQrming part of said barrier and operative only .below a predetermined pressure torvopening communication between op- .posite sides of said barrier.

l5. A measuring valve comprising a chamber, having an inlet and an outlet end, a

first and a second movable element in said l chamber, saidelements .when separated opening a passage through said chamber vand when approximated forming a complete barrier, a lirst resilient pressure sensitive means acting between said elements and tending to separate them,l a second resilient ment of said first element to said inlet end.

16. A measuring valve comprising a. chamber having an inlet'end and an outlet end,

. a lirst and a second movable element in said chamber, said elements when separated open- 'ing a passage through said chamber and when approximated forming a complete barrier, resilient pressure sensitive means acting between said elements and tending to separate them, a second resilient pressure sensitive means acting onsaid second element to move both elements to said inlet end and by abutment with said end to approximate said elements, said second resilient means being .both mechanically and hydraulically more powerful than said lirst resilient means, and trigger means set by movement of said second element to said outlet end for locking` it there, and released by movement of said lirst element io said inlet end.

17. A measuring valve con'iprising :i chainber having an inlet end and an outlet end, alirst and a second movable element in said chamber, said elements when separated opening a passage through said chamber and when approximated forming a camplete barrier, a lirst resilient pressure sensitive means acting between said elements and tending to' separate them, a second resilient pressure sensitive means acting on said second element to move both elements to said inlet end and by abutment with said end to approximate said. elements, said second resilient means being both mechanically and hydraulically more powerful than said lirst resilient means, and trigger means set by movement of said second element to said outlet end for locking it there.

18. A lubricating system comprising source. means for producing alternate periods of low fand high pressure, a bearing connected to said source, a barrier forming a `complete seal against the passage of lubricant, means permitting said barrier to yield under a pressure impulse and move the lubricant column in the direction of the bearing and automatic means operative upon relief of pressure for opening said barrier and re-establishing it at another point in the lubricant column more remote from the bearing. i

19. ir lubricating system comprising source means for producing alternate periods of low and high pressure, a bearing connected to said source, a barrier forming a, complete seal against the passage of lubricant, means permitting said barrier to yield under a pressure impulse and move the lubricant column in the direction of the, bearing, and means for opening said barrier and re-establishing it at another point in the lubricant column more remote Troni the bearing.

In witness whereof, I hereunto subscribe my name this 28 day of July, 1926.

DONALD H. SVEET. 

